syzkaller login: [ 30.710843] BUG: Bad rss-counter state mm:000000004187f131 type:MM_FILEPAGES val:33 [ 30.711846] BUG: Bad rss-counter state mm:000000004187f131 type:MM_ANONPAGES val:22 [ 30.877737] ================================================================== [ 30.878659] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.879582] Read of size 8 at addr ffff8880142bd310 by task sshd/221 [ 30.880496] [ 30.880749] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.881612] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.882585] Call Trace: [ 30.882917] [ 30.883197] dump_stack_lvl+0x91/0xf0 [ 30.883701] print_report+0xcc/0x620 [ 30.884204] ? __virt_addr_valid+0x102/0x340 [ 30.884761] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.885365] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.885980] kasan_report+0xbe/0xf0 [ 30.886445] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.887075] vma_interval_tree_remove+0xc75/0xec0 [ 30.887696] vma_prepare+0xc54/0x11a0 [ 30.888181] __split_vma+0x5af/0x950 [ 30.888665] ? __pfx___split_vma+0x10/0x10 [ 30.889186] ? find_held_lock+0x2c/0x110 [ 30.889712] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.890271] ? lock_is_held_type+0x9f/0x120 [ 30.890814] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.891406] ? mtree_range_walk+0x632/0x900 [ 30.891962] ? mas_walk+0x5c7/0x7c0 [ 30.892454] do_vmi_munmap+0x1f1/0x2b0 [ 30.892966] mmap_region+0x1f9/0x2660 [ 30.893440] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.893962] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.894677] ? __pfx_lock_acquire+0x10/0x10 [ 30.895198] ? __pfx_mmap_region+0x10/0x10 [ 30.895727] ? security_mmap_addr+0x7d/0xa0 [ 30.896276] ? get_unmapped_area+0x1f5/0x3f0 [ 30.896829] do_mmap+0x854/0xf00 [ 30.897260] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.897771] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.898326] ksys_mmap_pgoff+0x3af/0x500 [ 30.898839] do_syscall_64+0x3f/0x90 [ 30.899316] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.899964] RIP: 0033:0x7f4dd933dd82 [ 30.900431] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 30.902567] RSP: 002b:00007fffc3f8d128 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.903479] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4dd933dd82 [ 30.904346] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4dd8777000 [ 30.905189] RBP: 00007f4dd8777000 R08: 0000000000000009 R09: 0000000000001000 [ 30.906029] R10: 0000000000000812 R11: 0000000000000206 R12: 000056540f9d5ec0 [ 30.906879] R13: 00007fffc3f8d140 R14: 00007fffc3f8d170 R15: 00007fffc3f8d4d0 [ 30.907743] [ 30.908037] [ 30.908298] Allocated by task 214: [ 30.908741] kasan_save_stack+0x22/0x50 [ 30.909247] kasan_set_track+0x25/0x30 [ 30.909753] __kasan_slab_alloc+0x59/0x70 [ 30.910269] kmem_cache_alloc+0x16b/0x370 [ 30.910800] vm_area_dup+0x20/0x160 [ 30.911250] __split_vma+0x170/0x950 [ 30.911724] split_vma+0xc6/0x110 [ 30.912174] mprotect_fixup+0x8d2/0xb30 [ 30.912703] do_mprotect_pkey+0x87e/0xd40 [ 30.913226] __x64_sys_mprotect+0x78/0xc0 [ 30.913753] do_syscall_64+0x3f/0x90 [ 30.914238] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.914887] [ 30.915105] Freed by task 214: [ 30.915502] kasan_save_stack+0x22/0x50 [ 30.916003] kasan_set_track+0x25/0x30 [ 30.916523] kasan_save_free_info+0x2b/0x50 [ 30.917059] __kasan_slab_free+0x10a/0x190 [ 30.917626] kmem_cache_free+0x10d/0x4d0 [ 30.918138] rcu_core+0x8c8/0x2860 [ 30.918595] __do_softirq+0x1b7/0x7d4 [ 30.919083] [ 30.919300] Last potentially related work creation: [ 30.919901] kasan_save_stack+0x22/0x50 [ 30.920434] __kasan_record_aux_stack+0x8e/0xa0 [ 30.921011] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.921667] remove_vma+0x139/0x170 [ 30.922121] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.922697] do_vmi_munmap+0x1f1/0x2b0 [ 30.923186] __vm_munmap+0x138/0x3a0 [ 30.923661] __x64_sys_munmap+0x59/0x80 [ 30.924171] do_syscall_64+0x3f/0x90 [ 30.924655] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.925301] [ 30.925533] The buggy address belongs to the object at ffff8880142bd2b8 [ 30.925533] which belongs to the cache vm_area_struct of size 168 [ 30.927008] The buggy address is located 88 bytes inside of [ 30.927008] freed 168-byte region [ffff8880142bd2b8, ffff8880142bd360) [ 30.928449] [ 30.928679] The buggy address belongs to the physical page: [ 30.929331] page:00000000e7fa9e38 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x142bd [ 30.930421] memcg:ffff888018f22501 [ 30.930856] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.931512] page_type: 0xffffffff() [ 30.931961] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.932905] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018f22501 [ 30.933819] page dumped because: kasan: bad access detected [ 30.934475] [ 30.934700] Memory state around the buggy address: [ 30.935277] ffff8880142bd200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.936157] ffff8880142bd280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.937020] >ffff8880142bd300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.937894] ^ [ 30.938356] ffff8880142bd380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.939214] ffff8880142bd400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.940065] ================================================================== [ 30.941107] Disabling lock debugging due to kernel taint [ 32.721576] BUG: Bad rss-counter state mm:00000000722756bf type:MM_FILEPAGES val:33 [ 32.722744] BUG: Bad rss-counter state mm:00000000722756bf type:MM_ANONPAGES val:22 [ 33.252593] BUG: Bad rss-counter state mm:00000000a6f53c96 type:MM_FILEPAGES val:33 [ 33.253774] BUG: Bad rss-counter state mm:00000000a6f53c96 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50707' (ECDSA) to the list of known hosts. 2023/06/21 03:12:01 fuzzer started 2023/06/21 03:12:02 dialing manager at localhost:36067 2023/06/21 03:12:02 checking machine... 2023/06/21 03:12:02 checking revisions... [ 33.878779] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:12:02 testing simple program... [ 33.929990] cgroup: Unknown subsys name 'net' [ 34.014126] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:12:01 Registers: info registers vcpu 0 RAX=ffffffff8180f5bb RBX=ffffffff813ad470 RCX=ffffffff86138e01 RDX=1ffff11003196ede RSI=0000000000000000 RDI=ffffffff8180f5bb RBP=ffff888018cb7730 RSP=ffff888018cb7698 R8 =ffffffff86138eb4 R9 =ffff888018cb76d8 R10=0000000000038001 R11=0000000000020d9c R12=ffff888018cb7760 R13=0000000000000000 R14=ffff888018cbb680 R15=ffff8880084c6140 RIP=ffffffff810bd06d RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007faccdb4f900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007faccdb2e020 CR3=0000000017e42000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007ff525f9d6e0 CR3=000000000dc90000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=2031303a32313a3330203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031303a32313a3330203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000